Heatsng-frafvie for lamps



('Hodei.)

J. MELVIN. HE TING FRAME FOR LAMPS.

No 258,457 A Patented May 23,1882.

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- SPEGIFICATION forming part of Letter-s Eatent E0. 258,457, dated May 23, 1882.

Application filed April 3, 1882. (Model) To all whom it may concern Be it known that I, JosIAH W. MELVIN, a citizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented new and useful Improvements in Heating-Frames for Lamps, of which the following is a specification.

This invention relates to a stand or frame adapted to support vessels over a lamp having a chimney or globe, whereby the vessel can be conveniently heated and its contents warmed or cooked, as may be required.

Prior to my invention a stand or frame for such purpose has been constructed with a castrnetal ring for supporting the vessel, said ring being upheld by rods or legs that are received in sleeves, andadjusted therein by means of set-screws, so as to support; the vessel at the proper height. In 'such instance the upper edge of the ring upon which the vessel rests is serrated. Lugs or projections extending up to the level of the upper edge of the ring are formed upon the inner side of the ring, and the supportingrods are screwed into the said projections.

The object of my present invention is threefold, viz: first, to simplify and improve the adjustable supports for the top plate upon which the vessel is supported; secondly, to improve the construction of said top plate, so that vessels can be securely held thereon',and provision made for allowing the warm air to circulate both under and around the vessel, and at the same time providing suitable sockets for the supporting-rods; thirdly, to construct and combine the top plate and a base-ring with the supporting rods in a firm, durable, and eflicient manner. These objects lattain by means of the devices illustrated in the accompanying drawings, in which-- Figure 1 is an elevation of the frame, with a lamp shown in dotted lines arranged below its top plate; Fig. 2, a vertical section; Fig. 3, a top or plan view. Referring by letter to the several figures of the drawings, A indicates the top plate upon which the vessels to be heated are supported in an elevated. position above the lamp. This top plate consists of a thin cast-metal disk formed with a marginal annular flange, -a,which constitutes a guard for keeping the vessel in position upon the plate. This top plate is further formed with a central opening, B, for allowing theheatcd air from the lamp to pass up and come into direct contact with the vessel, and it is further formed upon its upper surface with a seriesof horizontal radial ribs, 0,

upon which the vessel rests, so that by thus supporting the vessel above the top surface or the plate a space will be ieft between the two for the circulation of hot air under the bottom of the vessel, The annular flange a is formed with the recesses a extending from the top edge of the flange to the upper face of the under the entire bottom of the vessel, will pass out through said recesses in tin flange and then circulate upward around the sides of the vessel, thereby subjecting the greater portion of its exterior to the action of heat. The support for this top plate consists of the upper and lower metal rods, D and E, arranged in sets of one pair each, the two rods of a set be ing held together by means of a slidable connection. The rods D of the upper set are reduced in diameter at their top ends and inserted in perforations formed through the radial ribs (lot the top plate, so that the plate will seat upon the shoulders thus formed on the rode, the ends of the rods above said ribs being headed, thereby rigidly connecting the parts together. It is desirable to make the top plate quite thin, so that it can be rapidly heated, and hence the ribs 6, while supporting the vessel above the plate, so as to leave a hot-air space between the two, will also thicken up the plate at their points of location sufificiently to form an increased bearing for the rods. The base ring F at the bottom of the structure is provided upon its under side with the feet or lugs j, which rest upon the table or other support, and serve to maintain the frame in a. level and steady condition, These feet plate, so that the hot air, alter circulating freely 65 also serve in one respect the same functions as the radial ribs of the top plate, since I perf0- their upper ends' with'th e upper set of rods by means of the socket-pieces G, that are fitted upon the lower 'set;of rods, and each provided with sleeves g, through which sleeves the upper set of rods are arranged to slide. The lower ends of the upper set of rods are likewisefitted into socket-pieces H, that fit the rods, and are provided each with a sleeve, h. These sleeves,ea'rried by the upper set of rods, fit upon and slide along the lower set of rods, G, each one of the sleeves being formed with a boss, h, through which a thumbscrew, I, passes. By this arrangement it will be seen that the expense of tubes, which are also liable to become clogged by dust, is avoided, and that after loosening the thumb-screws the top plate, with the rods secured thereto, can he raised to the required height-above the lamp,

and then secured in such elevated position by tightening up the thumb-screws. The legs or supports for the top plate, which, as has been seen, consist of rods connected in pairs by slidable joints, spread out at the base, after the manner of the legs of a tripod. The base-ring is made sufliciently large to encircle the base of any lamp, which, when a vessel containing water or food is to be heated, is placed within the base-ring and below the top plate, as illustrated in Fig. 1. V

'ribbed portions, substantially as described.

2. The combination, with the flanged castmetal top plate, A, formed with a centralopening and a series of .radial ribs, 0,; of the two sets'of supporting-rods D and E, and the metal base-ring provided with ugs f upon its under side, the upper set of rods being secured in the ribbed portions of the top plate, the lower set of rods being inserted in the base-rings where the feet or lugs occur,

and both sets of rods being connected together by slidable connections, substantially as described. I

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOSIAH W. MELVIN. Witnesses:

'P. F. HARDCASTLE, E. P. TURNER. 

